@misc{Toeppen_Max_Atlas,
 author={Toeppen Max},
 howpublished={online},
 publisher={Perthes Justus},
 language={ger},
 title={Atlas zur historisch-comparativen Geographie...},
 type={mapa},
 keywords={Prusy - mapa, atlas historyczny, Toeppen, Max (1822-1893)},
}